PAB Burst Structure

• Burst length: 5 msec

• Symbol rate: 23.4 ksps

• Modulation: p/4-QPSK

• Coding: convolutional code with r = 3/4 (single rate) & k=7

• Used as a random access burst when level 1 system synchronization (between SAS and UT) is maintained (or PT1 timer has not expired from the last uplink transmission), otherwise RACH has to be used.

• Access aperture: +/- 0.3 msec and +/-1.5 kHz

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